Implementation of the List interface that represents the results from a query
in AWS DynamoDB. Paginated results are loaded on demand when the user
executes an operation that requires them. Some operations, such as size(),
must fetch the entire list, but results are lazily fetched page by page when
possible.

This is an unmodifiable list, so callers should not invoke any operations
that modify this list, otherwise they will throw an
UnsupportedOperationException.